Door panel placement device enabling reuse of the mold

Abstract

The present application provides a door plate placing device capable of realizing repeated use of molds, wherein the door plate placing mechanism has a conveying track capable of switching conveying direction, thus the door plate placing lifting mechanism can lift the conveying track with the mold device to the height of the door plate processing conveying device in the door plate assembly line, so that the conveying track and the door plate processing conveying device form a relatively continuous track, thereby the mold device can be conveyed to the next station for subsequent assembly process; similarly, the door plate placing lifting mechanism can lift the empty conveying track to the height of the mold return conveying device in the door plate assembly line, so that the conveying track and the mold return conveying device form a relatively continuous track, thereby the returned mold device can be received, so that the repeated use of the mold device is realized in the door plate assembly line, and after the repeated use, a large number of mold devices need not to be prepared and transported, thereby the cost is saved, and the storage space and a large number of manpower are also saved.

Description

Technical Field

[0001] This invention belongs to the field of automotive interior parts manufacturing technology, specifically relating to a door panel placement device that enables the reuse of molds. Background Technology

[0002] Automotive interior parts are products used inside automobiles, including center consoles, door panels, seat cushions, and many other products. Door panel assembly involves multiple processes such as screwing, welding, installing clips, and quality inspection. Currently, the assembly of automotive door panels is mostly done manually, involving moving the parts to be assembled onto a workbench, securing them, and then using different tools to perform each process. This creates several problems: First, the large size and weight of automotive door panels result in high labor intensity and low production efficiency for operators; second, door panels are prone to bumps and knocks during handling, affecting product quality; third, operators need to switch between multiple processing tools, resulting in significant time spent switching, impacting production efficiency, and the varying skill levels of different operators also affect the consistency of the final product.

[0003] Therefore, in order to improve the production efficiency of automotive door panel assembly, reduce the labor burden of workers, and improve the quality and consistency of the final product, a door panel assembly line that can automatically or semi-automatically assemble automotive door panels at different workstations is needed. However, if the molds that hold the automotive door panel workpieces cannot be recycled and reused, a large number of molds need to be equipped at the beginning of the door panel assembly line during the production process, and the molds need to be collected and transported back to the beginning at the end of the assembly process. This occupies a lot of space at both ends and is inconvenient to operate. Therefore, a device that can realize the reuse of molds is needed. Summary of the Invention

[0004] This invention addresses the aforementioned problems and aims to provide a door panel placement device that can cooperate with other door panel processing conveying devices and mold return conveying devices at different workstations, thereby enabling the reuse of molds. The invention employs the following technical solution:

[0005] This invention provides a door panel placement device for use in conjunction with a door panel processing conveying device and a mold return conveying device in a door panel assembly line, enabling the reuse of mold devices. The door panel processing conveying device is used to sequentially transport mold devices carrying automotive door panel workpieces to be assembled to various workstations. The mold return conveying device is used to transport empty molds back to the first workstation in the opposite direction. The device is characterized by comprising: a door panel placement mechanism for positioning the mold device carrying the automotive door panel workpieces to be assembled to a predetermined assembly position, having a conveying track capable of switching conveying directions; and a door panel placement lifting mechanism for raising the conveying track carrying the mold device to the height of the door panel processing conveying device, thereby transporting the mold device to the next workstation, and lowering the empty conveying track to the height of the mold return conveying device, thereby receiving the returned mold device.

[0006] The door panel placement device provided by the present invention may also have the following technical features, wherein the lifting mechanism for placing the door panel includes: a plurality of vertical guide rails; a bracket for supporting the door panel placement mechanism, wherein the bracket is provided with a plurality of sliders, the plurality of sliders being slidably engaged with the plurality of vertical guide rails respectively; and a drive motor for placing the door panel, which is connected to the bracket through a transmission component for driving the bracket to lift.

[0007] The door panel placement device provided by the present invention may also have the following technical features, wherein the lifting mechanism for placing the door panel further includes: a counterweight cylinder, disposed above the drive motor for placing the door panel, for lifting the drive motor for placing the door panel upward, thereby reducing the burden on the drive motor for placing the door panel.

[0008] The door panel placement device provided by the present invention may also have the following technical features, wherein the transmission component includes a lead screw and a lead screw nut.

[0009] The door panel placement device provided by the present invention may also have the following technical features: the conveying track has two chain conveying tracks, which are connected by a drive shaft to achieve synchronous rotation; the chain conveying track is equipped with a chain track drive motor, which can switch rotation direction under the control of an industrial control computer, thereby switching the conveying direction of the conveying track.

[0010] The door panel placement device provided by the present invention may also have the following technical features: the mold device has a support unit for supporting the automobile door panel workpiece and a cover plate rotatably connected to the support unit; the door panel placement mechanism further includes: a lifting and positioning part for lifting the support unit upward and fixing it in the assembly position; and a rotation driving part for inserting into the cover plate and driving the cover plate to rotate, thereby opening or closing the mold device.

[0011] The door panel placement device provided by the present invention may also have the following technical features: a plurality of positioning blocks are provided below the support unit, each positioning block having a downward groove; a pair of height limiting blocks are provided on the side of the support unit; the lifting positioning part includes: a plurality of lifting cylinders arranged corresponding to the plurality of positioning blocks, the output end of which matches the groove, for lifting the support unit and fixing it in the horizontal direction; and at least a pair of lifting limiting members for abutting against the pair of height limiting blocks when lifting, thereby limiting the lifting height of the support unit.

[0012] The door panel placement device provided by the present invention may also have the following technical features: the height limiting block has a plurality of first pin holes, and the lifting limiting member has a plurality of second pin holes, which are arranged corresponding to the plurality of first pin holes. When the height limiting block abuts against the lifting limiting member, the plurality of first pin holes and the plurality of second pin holes are aligned to form a through hole for inserting a pin, thereby fixing the support unit in the vertical direction.

[0013] The door panel placement device provided by the present invention may also have the following technical features, wherein the rotation drive unit includes: a rotation drive motor for driving the cover plate to rotate and open and close; and a rotation transmission assembly for connecting the output end of the rotation drive motor and the cover plate, wherein when the lifting and positioning part lifts the support unit, the cover plate is inserted into the transmission assembly.

[0014] The door panel placement device provided by the present invention may also have the following technical features, wherein the rotation transmission component includes: a bearing; an opening and closing rod having a mounting hole at one end, which is installed at the output end of the rotation drive motor through the mounting hole and the bearing; and a circular pusher, which is rotatably installed at the other end of the opening and closing rod, wherein when the lifting positioning part lifts the support unit, the circular pusher is embedded in the U-shaped opening.

[0015] Invention Function and Effect

[0016] According to the door panel placement device of the present invention, there are a door panel placement mechanism and a door panel placement lifting mechanism. The door panel placement mechanism has a conveying track that can switch the conveying direction. Therefore, the door panel placement lifting mechanism can lift the conveying track carrying the mold device to the height of the door panel processing conveying device in the door panel assembly line, so that the conveying track and the door panel processing conveying device form a relatively continuous track, thereby enabling the mold device to be conveyed to the next workstation for subsequent assembly processes. Similarly, the door panel placement lifting mechanism can lift the empty conveying track to the height of the mold return conveying device in the door panel assembly line, so that the conveying track and the mold return conveying device form a relatively continuous track, thereby enabling the return of the mold device. This allows the mold device to be reused in the door panel assembly line. After reuse, there is no need to equip and transport a large number of mold devices, saving costs, storage space, and a large amount of manpower. Attached Figure Description

[0017] Figure 1 This is a partial structural diagram of the door panel placement device in an embodiment of the present invention;

[0018] Figure 2 This is a structural diagram of the mold device and the door panel placement mechanism in an embodiment of the present invention;

[0019] Figure 3 These are structural diagrams of the mold device and the door panel placement mechanism at different angles in embodiments of the present invention;

[0020] Figure 4 This is a schematic diagram of the positioning block and the lifting positioning part in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the connector and the rotation drive unit in an embodiment of the present invention;

[0022] Figure 6 This is a structural diagram of the mold device in the open state in an embodiment of the present invention;

[0023] Figure 7 This is a structural diagram of the mold pushing part in an embodiment of the present invention;

[0024] Figure 8 yes Figure 2 Enlarged view of the inner part of frame A;

[0025] Figure 9 This is a structural diagram of the mold device and the lifting mechanism for placing the door panel in an embodiment of the present invention;

[0026] Figure 10 This is a partial structural diagram of the lifting mechanism for placing the door panel in an embodiment of the present invention;

[0027] Figure 11This is a schematic diagram of the mold conveying device along the processing direction in a multi-station door panel assembly line according to an embodiment of the present invention;

[0028] Figure 12 This is a schematic diagram of the mold device reflow in the multi-station door panel assembly line of this invention.

[0029] Figure label:

[0030] Multi-station door panel assembly line 100; door panel processing conveyor 101; mold return conveyor 102; door panel placement device 10; door panel placement mechanism 11; mold pushing part 12; chain conveyor track 121; drive shaft 122; chain track drive motor 123; outer baffle 124; lifting and positioning part 13; lifting cylinder 131; lifting limit part 132; vertical section 1321; second pin hole 1321a; extension section 1322; buffer pad 1323; rotary drive part 14; rotary drive motor 141; rotary transmission assembly 142; bearing 1421; opening and closing rod 1422; circular pusher 1423; rotary limit assembly 143; door panel placement lifting mechanism 15; bracket 151; front support rod 151 1; Rear support rod 1512; Vertical guide rail 152; Bracket 153; Slider 1531; Lifting transmission assembly 154; Lead screw 1541; Adapter block 1542; Drive motor for door panel placement 155; Counterweight cylinder 156; Movable pin 157; Pin head 1571; Pin cylinder 1572; Mold device for door panel assembly 20; Support unit 21; Support frame 211; Positioning block 2111; Handle 2112; Height limit block 2113; First pin hole 2113a; Mold fixture 212; Cover plate 22; Cover plate frame 221; Pressing limit component 222; Press head 223; Connector 224; Connecting unit 23; Connecting bracket 231; Rotating shaft 232; Bearing assembly 233; Damping assembly 234. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following describes in detail the door panel placement device of the present invention that enables the reuse of molds, in conjunction with the embodiments and accompanying drawings.

[0032] <Example>

[0033] Figure 1 This is a partial structural diagram of the door panel placement device in this embodiment.

[0034] like Figure 1As shown, the door panel placement device 10 of this embodiment includes a door panel placement mechanism 11 and a door panel placement lifting mechanism 15. The door panel placement mechanism 11 is used to position the door panel assembly mold device 20 (hereinafter referred to as mold device 20) to a predetermined position in the workstation and to open and close the mold device 20. The door panel placement lifting mechanism 15 is used to drive the door panel placement mechanism 11 and the mold device 20 to move up and down in the vertical direction. The structure of the mold device 20 will be briefly described below.

[0035] Figure 2 This is a structural diagram of the mold device and the door panel placement mechanism in this embodiment.

[0036] like Figure 2 As shown, the mold device 20 includes a support unit 21, a cover plate 22, and a connecting unit 23.

[0037] The support unit 21 is used to support the door panel workpiece to be assembled, including a support frame 211, a support mold (not shown in the figure), and multiple mold fixing parts 212.

[0038] The support frame 211 is welded from square steel rods and steel sheets and is used to support the support mold. The support mold is made of a material with relatively low hardness and a certain degree of elasticity, and is used to support and limit the position of the automotive door panel workpiece. Multiple mold fixing parts 212 are respectively installed above the square rods of the support frame 211, and a structure for installing the support mold is formed between several mold fixing parts 212, with the support mold engaging between the several mold fixing parts 212.

[0039] Figure 3 This is a schematic diagram of the positioning block and the lifting positioning part in this embodiment.

[0040] like Figure 3 As shown, four positioning blocks 2111 are provided below the support frame 211. The positioning blocks 2111 have a downward-facing circular groove in the middle, which is used to cooperate with the door panel placement mechanism 11 when it is lifted and positioned. Due to structural obstruction, only part of the positioning blocks 2111 is shown in the figure.

[0041] In addition, such as Figure 2 As shown, a pair of height limiting blocks 2113 are provided on both sides of the support frame 211. The height limiting blocks 2113 are metal blocks with three first pin holes 2113a. When the mold device 20 is placed on the workstation, the first pin holes 2113a face the chain conveyor tracks on both sides. Multiple pairs of handles 2112 are also provided on both sides of the support frame 211 along the conveying direction, for operators to place the mold device 20 as a whole into or remove it from the workstation.

[0042] The cover plate 22 is rotatably connected to the support unit 21 and is used to press the door panel workpiece onto the support unit 21, thereby fixing the door panel workpiece. The cover plate 22 includes a cover plate frame 221, a pair of pressing limit members 222, a plurality of pressing heads 223, and a plug-in member 224.

[0043] The cover frame 221 is welded from aluminum profiles. The structure of the cover frame 221 is designed to install multiple pressure heads 223 and to arrange the multiple pressure heads 223 according to a predetermined rule.

[0044] A pair of pressing limiting members 222 are both L-shaped metal parts, which are respectively installed on both sides of the cover plate frame 221. When the cover plate 22 rotates towards the support unit 21, the extended ends of the pressing limiting members 222 abut against the square rods on both sides of the cover plate frame 221, thereby achieving the limiting function and avoiding damage to the automotive door panel workpiece inside.

[0045] The pressure head 223 consists of a metal rod and an elastic element wrapped around the end of the metal rod. The other end of the metal rod is welded to the cover frame 221. The metal rod is perpendicular to the surface direction of the cover frame 221 and extends towards the support unit 21. The arrangement of the multiple pressure heads 223 and the extension length of each pressure head 223 are matched to the upper surface of the automotive door panel workpiece to be pressed. The multiple pressure heads 223 are used to abut against different parts of the upper surface of the automotive door panel workpiece when the cover 22 is rotated and closed, thereby fixing the automotive door panel workpiece and preventing collisions during transportation.

[0046] Figure 4 This is a schematic diagram of the connector and the rotation drive unit in this embodiment.

[0047] like Figure 4 As shown, the connector 224 is a metal part, which is fixedly installed on the side of the cover frame 221 connected to the support unit 21 by screws and other connectors. It has an outward U-shaped opening, and the connector 224 and the cover frame 221 form an obtuse angle. When the cover 22 is closed, that is, when the surface direction of the cover frame 221 is approximately in line with the horizontal direction, the U-shaped opening of the connector 224 tilts upward.

[0048] like Figure 2 and Figure 4 As shown, the connecting unit 23 is used to connect the support unit 21 and the cover plate 22. The connecting unit 23 includes a connecting bracket 231, a rotating shaft 232, multiple pairs of bearing assemblies 233 and a damping assembly 234.

[0049] The connecting bracket 231 is a metal bracket installed on one side of the support frame 211. The rotating shaft 232 is installed on the connecting bracket 231, and the extension direction of the rotating shaft 232 is consistent with the extension direction of the square rod on the side of the support frame 211. The cover frame 221 is installed on the rotating shaft 232 via two pairs of bearing assemblies 233 and can rotate along the rotating shaft 232. The middle part of one side of the cover frame 221 is connected to the connecting bracket 231 via a damping assembly 234. The damping assembly 234 can provide a certain resistance when the cover 22 rotates, thereby limiting its rotation speed and preventing the cover frame 221 from rotating and pressing down too quickly when closed, which could damage the automotive door panel workpiece.

[0050] Figure 5 This is a structural diagram of the mold device in the open state in this embodiment.

[0051] like Figure 2-5 As shown, when the cover plate 22 is flipped and closed toward the support unit 21, the car door panel workpiece is fixed between the two. When the cover plate 22 is flipped open in the opposite direction, the car door panel workpiece can be placed, taken out, replaced, or inspected or assembled.

[0052] The structure and function of the door panel placement mechanism 11 and the door panel placement lifting mechanism 15 will be explained in detail below in conjunction with the relevant structure of the mold device 20.

[0053] like Figure 2 As shown, the door panel placement mechanism 11 includes a mold pushing part 12, a lifting and positioning part 13, and a rotation driving part 14.

[0054] Figure 6 This is a structural diagram of the mold pushing part in this embodiment.

[0055] Figure 7 These are structural diagrams of the mold pushing part at different angles in this embodiment.

[0056] like Figure 6 and Figure 7 As shown, the mold pushing unit 12 includes two chain conveyor tracks 121, a drive shaft 122, and a chain track drive motor 123.

[0057] Two parallel chain conveyor tracks 121 are arranged with a spacing matching the width of the mold device 20. When the mold device 20 is placed on the chain conveyor tracks 121, both sides of the mold device 20 are respectively mounted on the two chain conveyor tracks 121 along its width direction, thereby enabling the mold device 20 to move within the current workstation. The chain conveyor tracks include drive gears and annular chains mounted on the drive gears, etc., the specific structure of which is prior art and will not be described in detail.

[0058] In addition, outer baffles 124 are provided on the outer sides of the two chain conveyor tracks 121. The upper edge of the outer baffles 124 is higher than the upper end face of the chain conveyor track 121, thereby forming a clamping structure for the mold device 20 on the chain conveyor track 121 to prevent it from tilting or even falling during the conveying process, and also to protect the chain.

[0059] The two ends of the drive shaft 122 are respectively connected to the two drive gears of the two chain conveyor tracks 311 through bearing assemblies, so as to keep the conveying speed of the two chain conveyor tracks 121 consistent, thereby enabling the mold device 20 to be conveyed smoothly.

[0060] The chain drive motor 123 is used to drive the chain of the chain conveyor track 121 to rotate. Under the control of the industrial control computer, the chain drive motor 123 can rotate forward or reverse, that is, the chain conveyor track is a conveyor track that can switch conveying directions. Specifically, the chain drive motor 123 can drive the chain of the chain conveyor track 121 along... Figure 6 The mold assembly 20 is rotated in the direction indicated by D1 or D2, thereby pushing the mold assembly 20 to the next station along the D1 direction, or receiving the returned mold assembly 20 from the previous station along the D2 direction. Due to the presence of the drive shaft 122, both chain conveyor tracks 121 rotate in the same direction under the drive of the chain track drive motor 123.

[0061] The mold device 20 is placed on the chain conveyor track 121. When the mold device 20 moves with the chain conveyor track 121 to a predetermined position in the workstation, the lifting and positioning part 32 lifts the mold device 20 upwards a predetermined distance, so that the mold device 20 is disengaged from the chain conveyor track 121, so that the mold device 20 no longer moves and stays in the current workstation for inspection or assembly.

[0062] Figure 8 yes Figure 2 Enlarged view of the inner part of frame A.

[0063] like Figure 3 and Figure 8 As shown, the lifting and positioning part 13 includes four lifting cylinders 131 and a pair of lifting limit members 132.

[0064] Four lifting cylinders 131 are mounted on the bracket in the door panel placement device 10. The four lifting cylinders 131 are distributed at the four corners of a rectangle and are at a uniform vertical height. The arrangement of the four lifting cylinders 131 corresponds to the arrangement of the four positioning blocks 2111 at the bottom of the mold device 20. The output ends of the lifting cylinders 131 match the circular grooves of the positioning blocks 2111 and can be embedded in the circular grooves. During lifting and positioning, under the control of the industrial control computer, the four lifting cylinders 131 lift simultaneously, their output ends abutting against the bottom surface of the circular grooves, thereby smoothly lifting the mold device 20. Simultaneously, since the output ends of the four lifting cylinders 131 are respectively embedded in the circular grooves of the four positioning blocks 2111, the mold device 20 is fixed horizontally after lifting.

[0065] like Figure 8 As shown, a pair of lifting limit members 132 are respectively disposed on an outer baffle 124 to limit the lifting height of the mold device 20 when lifting the mold device 20. The lifting limit member 132 includes a vertical section 1321, an extension section 1322, and a buffer pad 1323 made of metal. One end of the vertical section 1321 is connected to the bracket in the door panel placement device 10 and extends vertically. The extension section 1322 extends horizontally from the other end of the vertical section 1321 toward the chain conveyor track 121. The buffer pad 1323 is installed on the lower surface of the extension section 1322 and is made of a relatively low-hardness material such as plastic to provide a buffering effect during the limiting. Three second pin holes 1321a are provided on the vertical section 1321, and the arrangement of the three second pin holes 1321a corresponds to the three first pin holes 2113a on the height limiting block 2113.

[0066] When the mold assembly 20 is lifted, the upper surfaces of the pair of height limiting blocks 2113 of the mold assembly 20 abut against the buffer pads 1323 on the lower surfaces of the extensions 1322 of the pair of lifting limiting members 132, thereby blocking the mold assembly 20 at a predetermined lifting height, which is higher than the outer baffle 124, allowing the pin holes to protrude from above the outer baffle 124. When the mold assembly 20 is blocked, the three first pin holes 2113a and the three second pin holes 1321a are aligned to form a through hole, at which point a pin can be inserted into the through hole, thereby fixing the mold assembly 20 vertically.

[0067] After the mold device 20 is fixed, the cover plate 22 can be opened to perform inspection or assembly operations on the automotive door panel workpiece at the current workstation. In this embodiment, at the door panel placement workstation, after the mold device 20 is opened, the automotive door panel workpiece to be processed is placed in, photographed and inspected, and then the mold device 20 is closed to transport it to the next workstation.

[0068] like Figure 4As shown, the rotary drive unit 14 is used to rotate the cover plate 22 of the mold device 20 to open or close. The rotary drive unit 14 includes a rotary drive motor 141, a rotary transmission assembly 142, and a rotary limit assembly 143.

[0069] The rotary drive motor 141 is used to drive the cover plate 22 to rotate.

[0070] The rotary transmission assembly 142 includes a bearing 1421, an opening / closing rod 1422, and a circular pusher 1423. The opening / closing rod 1422 has two circular ends, one larger than the other, gradually narrowing from the larger end to the smaller end. A circular mounting hole is provided at the larger end, through which the opening / closing rod 1422 is mounted to the output end of the rotary drive motor 141. Driven by the rotary drive motor 141, the opening / closing rod 1422 can swing vertically. The circular pusher 1423 is rotatably mounted on the smaller end of the opening / closing rod 1422 via bolts, nuts, or other connecting parts. The diameter of the circular pusher 1423 matches the opening width of the U-shaped opening of the connector 224 of the mold device 20, allowing it to be inserted into the U-shaped opening and push one side of the U-shaped opening, thereby driving the cover plate 22 to open and close. Specifically, taking the opening of cover 22 as an example, the rotary drive motor 141 drives the opening and closing rod 1422 to swing downward, and the circular pusher 1423 presses against the lower side of the U-shaped opening of the plug 224 and pushes it, thereby causing the cover 22 to rotate upward and open through the lever action.

[0071] Furthermore, the initial position setting of the opening and closing rod 1422 corresponds to the lifting position setting of the lifting positioning part 32. When the mold device 20 is lifted into place by the lifting positioning part 32, the circular pusher 1423 of the opening and closing rod 1422 is inserted into the U-shaped opening of the connector 224 of the mold device 20.

[0072] The rotation limiting assembly 143 includes four perforated plates 1431 and four proximity sensors 1432, used to limit the maximum stroke of the opening / closing rod 1422. Two of the perforated plates 1431 are positioned above the output end of the rotary drive motor 141, and the other two are positioned below. Two proximity sensors 1432 are installed in the perforations of the two upper perforated plates 1431 by nuts, and the other two proximity sensors 1432 are installed in the same manner below. Among the two upper proximity sensors 1432, the uppermost proximity sensor 1432 is further away from the output end of the rotary drive motor 141 in the horizontal direction. When the opening / closing rod 1422 swings upward, when the two upper proximity sensors 1432 simultaneously sense the opening / closing rod 1422, it indicates that the opening / closing rod 1422 has swung upward to the predetermined maximum position, that is, the cover plate 22 has closed in place. At this time, the industrial control computer can control the rotary drive motor 141 to stop working in a timely manner based on the signals from the two upper proximity sensors 1432, to prevent the cover plate 22 from pressing down further and damaging the automotive door panel workpiece. The same applies to the two proximity sensors 1432 below, so I won't repeat the explanation.

[0073] This embodiment only specifically describes one mold device 20. In reality, since automobile door panel products have various specifications (front door panel, rear door panel, door panels for different car models, etc.), and different specifications of automobile door panels differ in size and shape, multiple mold devices 20 can be set according to assembly needs, each corresponding to a different specification of automobile door panel. The overall size of the mold device 20, the shape of the cover frame 221, the arrangement and extension length of each pressure head 223 can all be set differently to correspond to different specifications of automobile door panels. Since the mold pushing part 12 only needs the mold device 20 to have a predetermined width, the lifting and positioning part 13 only needs to cooperate with the four positioning blocks, and the rotation driving part 14 only needs to cooperate with the plug-in part 224, for multiple mold devices 20, as long as their overall width, positioning block 2111 and plug-in part 224 are consistent, the door panel placement mechanism 11 is a universal mechanism. When changing the mold device 20, the door panel placement mechanism 11 does not need to be replaced or adjusted.

[0074] Furthermore, the aforementioned mold device 20 and door panel placement mechanism 11 are both mounted on the bracket of the door panel placement lifting mechanism 15, allowing for overall lifting and lowering.

[0075] Figure 9 This is a structural diagram of the mold device and the lifting mechanism for placing the door panel in this embodiment.

[0076] Figure 10 This is a partial structural diagram of the lifting mechanism for placing the door panel in this embodiment.

[0077] like Figure 9 and Figure 10As shown, the lifting mechanism 15 for placing the door panel includes a bracket 151, multiple vertical guide rails 152, a bracket 153, a lifting transmission assembly 154, a drive motor 155 for placing the door panel, and a counterweight cylinder 156.

[0078] The bracket 151 is used to provide support for lifting, and the bracket 151 includes two relatively short front support rods 1511 and two relatively long rear support rods 1512.

[0079] Multiple vertical guide rails 152 are used to provide guidance for lifting. In this embodiment, there are four vertical guide rails 152. Two shorter vertical guide rails 152 are set on two front support rods 1511, and two longer vertical guide rails 152 are set on two rear support rods 1512. All guide rails face inward towards the bracket.

[0080] The bracket 153 is a metal frame used to support the door panel placement mechanism 11 and the mold device 20, and to drive them to rise and fall. Viewed from the side, the bracket 153 is L-shaped, with a shorter front end and a longer rear end. Two sliders 1531 are provided on the front end, and four sliders 1531 are provided on the rear end in groups of two. The multiple sliders 1531 are slidably engaged with multiple vertical guide rails 152 to form a guiding fit.

[0081] The door panel placement drive motor 155 drives the bracket 153 to rise and fall through the lifting transmission assembly 154, thereby driving the door panel placement mechanism 11 and the mold device 20 to rise and fall.

[0082] The lifting transmission assembly 154 includes a lead screw 1541 extending vertically between two rear support rods 1512, a lead screw nut (not shown in the figure) mounted on the lead screw 1541, and a transition block 1542 mounted on the lead screw 1541 and held in place by the lead screw nut. The bracket 153 is mounted on the lead screw 1541 via the transition block 1542. Driven by the door panel placement drive motor 155, the lead screw 1541 drives the bracket 153 to rise and fall. The specific details are existing technology and will not be described in detail.

[0083] A counterweight cylinder 156 is mounted on the door panel placement drive motor 155 to lift the door panel placement drive motor 155 upwards, thereby reducing the load on one side of the door panel placement drive motor 155. Since the door panel placement drive motor 155 itself is relatively heavy, and it also has structures such as the connecting unit 23 and the long rear end of the bracket 153 on one side, its overall weight is heavier than the other side. Therefore, the unbalanced weight increases the burden on the door panel placement drive motor 155 and leads to a reduction in the lifespan of transmission structures such as the slider and guide rail. Therefore, the counterweight cylinder 156 effectively alleviates these problems.

[0084] In addition, a pair of movable pins 157 are provided on both sides of the two rear vertical guide rails 152. Each movable pin 157 includes a pin head 1571 that can extend and retract horizontally, and a pin cylinder 1572 for driving the extension and retraction of the pin head 1571. The pair of movable pins 157 are set at a height corresponding to the height of the door panel processing conveyor. When the bracket 153 is raised to the corresponding height, the chain conveyor track 121 on the bracket 153 is approximately at the same height as the track of the door panel processing conveyor, forming a relatively continuous track. At this time, the bracket 153 can be fixed at this height by the pair of movable pins 157.

[0085] Figure 11 This is a schematic diagram of the mold conveying device along the processing direction of the multi-station door panel assembly line in this embodiment. Figure 12 This is a schematic diagram of the mold device reflow in the multi-station door panel assembly line of this embodiment.

[0086] like Figure 11 and Figure 12 As shown, the multi-station door panel assembly line 100 includes five stations, which are used for different inspection and assembly processes. The door panel placement device 10 mentioned above is one of the stations, which is used to place the automotive door panel workpiece to be assembled and to inspect it. After the inspection is completed, the mold device 20 closes and is sequentially transported to multiple subsequent stations for different assembly processes.

[0087] The door panel assembly line 100 also includes a door panel processing conveyor 101 and a mold return conveyor 102 connecting the second to fifth workstations. In this embodiment, the door panel processing conveyor 101 and the mold return conveyor 102 are both conveyor tracks and are set at different heights. The door panel processing conveyor 101 is set at the top, and its conveying direction is shown in D1. There are no obstructions above it, which facilitates assembly. The mold return conveyor 102 is set at the bottom, and its conveying direction is shown in D2. That is, the conveying directions of the door panel processing conveyor 101 and the mold return conveyor 102 are opposite.

[0088] Under the control of the industrial control computer, when the lifting mechanism 15 for placing the door panel raises the chain conveyor track 121 carrying the mold device 20 to the height of the door panel processing conveyor device 101, and the conveying direction of the chain conveyor track 121 is as shown in direction D1, the chain conveyor track 121 and the door panel processing conveyor device 101 form a relatively continuous conveying track, which can transport the mold device 20 on the door panel placing device 10 (i.e., one station, door panel placing station) to the next station. Similarly, when the lifting mechanism 15 for placing the door panel lowers the empty chain conveyor track 121 to the height of the mold return conveyor device 102, and the conveying direction of the chain conveyor track 121 is as shown in direction D2, the mold return conveyor device 102 and the chain conveyor track 121 form a relatively continuous conveying track, and the chain conveyor track 121 can receive the mold device 20 returning from the lower layer, thereby realizing the reuse of the mold device 20.

[0089] Functions and effects of the embodiments

[0090] The door panel placement device provided in this embodiment includes a door panel placement mechanism and a door panel placement lifting mechanism. The door panel placement mechanism has a conveying track that can switch the conveying direction. Therefore, the door panel placement lifting mechanism can lift the conveying track carrying the mold device to the height of the door panel processing conveying device in the door panel assembly line, so that the conveying track and the door panel processing conveying device form a relatively continuous track, thereby enabling the mold device to be conveyed to the next workstation for subsequent assembly processes. Similarly, the door panel placement lifting mechanism can lift the empty conveying track to the height of the mold return conveying device in the door panel assembly line, so that the conveying track and the mold return conveying device form a relatively continuous track, thereby enabling the return of the mold device. This allows the mold device to be reused in the door panel assembly line. After reuse, there is no need to equip and transport a large number of mold devices, saving costs, storage space, and a large amount of manpower.

[0091] Furthermore, the door panel placement lifting mechanism is equipped with a counterweight cylinder on the door panel placement drive motor, which can balance the load on both sides, thereby avoiding the reduction in the lifespan of the transmission structure caused by a large difference in load on both sides, and reducing the burden on the drive motor.

[0092] Furthermore, the door panel placement mechanism has a lifting and positioning part, which can lift and position the mold device upwards when it reaches the predetermined position, so that the mold device is disengaged from the chain conveyor track and no longer moves, but stays at the predetermined position in the current workstation for inspection or assembly. Since the door panel placement mechanism also has a rotary drive part, and when the mold device is lifted, the mold device's connector is inserted into one end of the opening and closing rod of the rotary drive part, the rotary drive part can drive the cover plate of the mold device to rotate and open and close after the mold device is lifted, so that the automotive door panel workpiece to be assembled can be placed in, and after placement, the cover plate is closed to press the automotive door panel workpiece in place, which is beneficial for transporting automotive door panel workpieces between workstations.

[0093] The above embodiments are only used to illustrate specific implementations of the present invention, and the present invention is not limited to the scope of the description of the above embodiments.

Claims

1. A door panel placement device, used in conjunction with a door panel processing conveying device and a mold return conveying device in a door panel assembly line to achieve the reuse of the mold device, characterized in that, include: A door panel placement mechanism is used to position a mold device holding an automotive door panel workpiece to be assembled to a predetermined assembly position, and has a conveyor track that can switch the conveying direction. as well as A lifting mechanism for placing door panels is used to move the conveyor track carrying the mold assembly upwards to the height of the door panel processing conveyor, thereby conveying the mold assembly to the next workstation, and to move the empty conveyor track downwards to the height of the mold return conveyor, thereby receiving the returned mold assembly. The mold device includes a support unit for supporting the automotive door panel workpiece and a cover plate rotatably connected to the support unit. The door panel placement mechanism includes: The lifting and positioning part is used to lift and position the mold device at the current workstation so that the mold device is positioned at a predetermined assembly position. A rotary drive unit is used to drive the cover plate to rotate, thereby opening or closing the mold assembly; and The mold pushing section is used to transport the mold assembly. A connector with a U-shaped opening is provided on the side of the cover plate that connects to the support unit. The rotation drive unit includes: A rotary drive motor for driving the cover plate to rotate; and A rotary transmission assembly, used to connect the output end of the rotary drive motor and the cover plate, includes a bearing, an opening / closing rod, and a circular pusher. The large end of the opening / closing rod is mounted on the output end of the rotary drive motor via the bearing, and the circular pusher matches the U-shaped opening and is located at the small end of the opening / closing rod. When the mold device is lifted into position by the lifting and positioning part, the circular pusher at the small end of the opening and closing rod is embedded in the U-shaped opening of the connector.

2. The door panel placement device according to claim 1, Its features are: The lifting mechanism for placing the door panel includes: Multiple vertical guide rails; A bracket for supporting the door panel placement mechanism, the bracket being provided with multiple sliders, each slider being slidably engaged with a plurality of vertical guide rails; and A drive motor for placing the door panel is connected to the bracket via a transmission assembly and is used to drive the bracket to lift and lower.

3. The door panel placement device according to claim 2, characterized in that: in, The lifting mechanism for placing the door panel also includes: A counterweight cylinder is positioned above the drive motor for placing the door panel, and is used to lift the drive motor for placing the door panel upward, thereby reducing the load on the drive motor for placing the door panel.

4. The door panel placement device according to claim 2, characterized in that: in, The transmission assembly includes a lead screw and a lead screw nut.

5. The door panel placement device according to claim 1, characterized in that: in, The conveying track has two chain conveying tracks. The two chain conveyor tracks are connected by a drive shaft to achieve synchronous rotation. The chain conveyor track is equipped with a chain drive motor. Under the control of an industrial control computer, the chain drive motor can switch its rotation direction, thereby changing the conveying direction of the conveyor track. The conveying direction of the conveying device for door panel processing is the D1 direction. The mold return conveying device is positioned in the D2 direction and is located below the door panel processing conveying device. Under the control of the industrial control computer, when the lifting mechanism for placing the door panel raises the chain conveyor track carrying the mold device to the height of the door panel processing conveyor, and the conveying direction of the chain conveyor track is the D1 direction, the chain conveyor track and the door panel processing conveyor form a continuous conveying track; when the lifting mechanism for placing the door panel raises the empty chain conveyor track to the height of the mold return conveyor, and the conveying direction of the chain conveyor track is the D2 direction, the chain conveyor track and the mold return conveyor form a continuous conveying track.

6. The door panel placement device according to claim 1, Its features are: in, Multiple positioning blocks with downward-facing grooves are provided below the support unit, and a pair of height limiting blocks are provided on the side of the support unit. The lifting and positioning part includes: Multiple lifting cylinders are arranged to correspond to the multiple positioning blocks, and their output ends are matched with the grooves, for lifting the support unit and fixing it in the horizontal direction; as well as At least one pair of lifting limiters are provided for abutting against a pair of height limiters during lifting, thereby limiting the lifting height of the support unit.

7. The door panel placement device according to claim 6, characterized in that: in, The height limiting block has multiple first pin holes. The lifting and limiting component has multiple second pin holes, which are arranged corresponding to the multiple first pin holes. When the height limiting block abuts against the lifting limiting member, the plurality of first pin holes and the plurality of second pin holes align to form a through hole for inserting a pin, thereby fixing the support unit in the vertical direction.

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